ap1533 Diodes, Inc., ap1533 Datasheet
ap1533
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ap1533 Summary of contents
Page 1
... AP1533 consists of step-down switching regulator with PWM control. These devices include a reference voltage source, oscillation circuit, error amplifier, internal PMOS. AP1533 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to vary the duty ratio linearly from 99%. This converter also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup ...
Page 2
... Add an external resistor to set max output current power supply pin CC Switch Pin. Connect external inductor/diode here. Minimize trace area Output this pin to reduce EMI GND Pin SS AP1533 Rev. 1 PWM CONTROL 1.8A STEP-DOWN CONVERTER AP1533 ...
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... The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Recommended Operating Conditions Symbol V Input Voltage IN I Output Current OUT T Operating Ambient Temperature A AP1533 Rev. 1 PWM CONTROL 1.8A STEP-DOWN CONVERTER Output Oscillation Circuit PWM-Switched Control Circuit Thermal Shutdown V EN OCSET EN ...
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... Junction-to-Ambient Thermal Resistance θ JC Junction-to-Case Note: 3. Test condition: Device mounted on FR-4 PCB, 2”x2”, 2oz copper, minimum recommended pad layout, single side. For better thermal performance, larger copper pad for heatsink is needed. AP1533 Rev. 1 PWM CONTROL 1.8A STEP-DOWN CONVERTER Conditions I = 0.1A OUT I = 0.1A ...
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... OUT OUT 320 318 316 314 312 310 308 306 304 302 300 (V) IN AP1533 Rev. 1 PWM CONTROL 1.8A STEP-DOWN CONVERTER Vcc Output 33uH AP1533 Optional FB OCSET (Note (1 OUT ...
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... V (V) IN Efficiency 100% 90% 80% 70% 60% 50% 40% 30% 20 (A) OUT V Ripple OUT ( V = 12V 3.3V OUT OUT AP1533 Rev. 1 PWM CONTROL 1.8A STEP-DOWN CONVERTER ( Continued ) 3.25 3.24 3.23 3.22 3.21 3.20 3.19 3.18 3.17 3.16 3.15 0 VOUT=3.3V VOUT= 12V www.diodes.com AP1533 Load Regulation (V =12V) IN 0.5 1 1.5 2 ...
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... Under Voltage Lockout The under voltage lockout circuit of the AP1533 assures that the high-side MOSFET driver remains in the off state whenever the supply voltage drops below 3.3V. Normal operation resumes once V rises above 3 ...
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... Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated. AP1533 Rev. 1 PWM CONTROL 1.8A STEP-DOWN CONVERTER (Top View) ...